add logs

Author: sakthivelmanii

google-cloud-spanner/src/test/java/com/google/cloud/spanner/MultiplexedSessionDatabaseClientMockServerTest.java

@@ -306,6 +306,7 @@ public void testDeadlineExceededErrorWithOneRetry() {
   @Test
   public void testDeadlineExceededErrorWithOneRetryWithParallelRequests()
       throws InterruptedException {
+    System.out.println("---------------------------------------------------------------------------");
     mockSpanner.setCreateSessionExecutionTime(
         SimulatedExecutionTime.ofExceptions(
             Arrays.asList(
@@ -410,6 +411,8 @@ public void testDeadlineExceededErrorWithOneRetryWithParallelRequests()
     assertEquals(3L, client.multiplexedSessionDatabaseClient.getNumSessionsReleased().get());
 
     testSpanner.close();
+
+    System.out.println("---------------------------------------------------------------------------");
   }
 
   @Test